Mitsubishi Colt Ralliart. Manual — part 349
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-140
Step 5. Check the wiring harness between B-123
headlamp relay (LO) connector terminal Nos.1, 3
and the fusible link (1).
NOTE:
Prior to the wiring harness inspection, check the
junction block connector B-108, and repair if neces-
sary.
• Check the power supply line from the fusible link
(1) for open circuit.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
use Troubleshooting/inspection Service
Points
− How to Cope with Intermittent
).
NO :
Repair the wiring harness.
Step 6. Connector check: B-134 ETACS-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Repair the defective connector.
Step 7. Retest the system.
Check that the low-beam headlamps illuminate nor-
mally.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
use Troubleshooting/inspection Service
Points
− How to Cope with Intermittent
).
NO :
Replace the ETACS-ECU.
AC313870 AD
Connector: B-123
Junction Block (Front view)
Harness side
AC313870
Connector: B-108
BD
Junction block (Front view)
B-108(B)
Harness side
AC313872 AH
Connector: B-134
Harness side
Junction block (Rear view)
Main
Index
Group
TOC
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-141
INSPECTION PROCEDURE J-3: The high-beam headlamps do not illuminate normally.
CAUTION
Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.
COMMENTS ON TROUBLE SYMPTOM
If the high-beam headlamps do not illuminate, the
headlamp switch input circuit, the headlamp relay
(HI) or the ETACS-ECU may be defective.
POSSIBLE CAUSES
• Malfunction of the headlamp relay (HI)
• Malfunction of the column switch
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSTIC PROCEDURE
Step 1. Check that the headlamps operate.
Check that the low-beam headlamps illuminate and
extinguish normally.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Refer to Inspection Procedure J-2 "The
low-beam headlamps do not illuminate
normally
."
Step 2. Pulse check
Check the input signal from the dimmer switch.
OK: The M.U.T.-III sounds or the voltmeter
needle fluctuates.
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Refer to Inspection Procedure N-4 "The
column switch (lighting and turn-signal lamp
switch) signal is not received
J/B SIDE
Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet
Headlamp Relay (High-Beam) Circuit
ETACS-ECU
HEADLAMP
RELAY (HI)
HAEDLAMP
FUSIBLE
LINK
1
· HEADLAMP SWITCH
INPUT SIGNAL
· DIMMER SWITCH
System switch
Check condition
Dimmer switch
When the dimmer switch
is turned from off to on
Main
Index
Group
TOC
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-142
Step 3. Connector check: B-122 headlamp relay
(HI) connector
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Repair the defective connector.
Step 4. Check the headlamp relay (HI).
Refer to GROUP 54A
− Headlamp
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Replace the headlamp relay (HI).
Step 5. Voltage measurement at B-122 headlamp
relay (HI) connector.
(1) Remove the headlamp relay (HI), and measure at
the junction block side.
(2) Voltage between B-122 headlamp relay (HI)
connector terminal Nos.1, 3 and body earth
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Go to Step 6.
Step 6. Check the wiring harness between B-122
headlamp relay (HI) connector terminal Nos.1, 3
and the fusible link (1).
NOTE:
Prior to the wiring harness inspection, check the
junction block connector B-108, and repair if neces-
sary.
• Check the power supply line from the fusible link
(1) for open circuit.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
use Troubleshooting/inspection Service
Points
− How to Cope with Intermittent
).
NO :
Repair the wiring harness.
AC313870AE
Connector: B-122
Junction Block (Front view)
Harness side
AC313870AE
Connector: B-122
Junction Block (Front view)
Harness side
AC313972AU
Connector B-122
(Junction block side)
AC313870AE
Connector: B-122
Junction Block (Front view)
Harness side
AC313870
Connector: B-108
BD
Junction block (Front view)
B-108(B)
Harness side
Main
Index
Group
TOC
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-143
Step 7. Connector check: B-134 ETACS-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 8.
NO :
Repair the defective connector.
Step 8. Retest the system.
Check that the high-beam headlamps illuminate nor-
mally.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
use Troubleshooting/inspection Service
Points
− How to Cope with Intermittent
).
NO :
Replace the ETACS-ECU.
INSPECTION PROCEDURE J-4: The high-beam and low-beam headlamps do not illuminate when the
passing switch is operated.
CAUTION
Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.
COMMENTS ON TROUBLE SYMPTOM
If the low-beam and high-beam headlamps are nor-
mal, the passing switch input signal circuit or the
ETACS-ECU may be defective.
POSSIBLE CAUSES
• Malfunction of the column switch
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. Check the operation of the headlamps.
Check that the low-beam and high-beam headlamps
illuminate normally.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the headlamps. Refer to trouble
symptom chart
Step 2. Pulse check
Check the input signal from the passing switch.
OK: The M.U.T.-III sounds or the voltmeter
needle fluctuates.
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Refer to Inspection Procedure N-4 "The
column switch (lighting and turn-signal lamp
switch) signal is not received
Step 3. Retest the system.
When the passing switch is turned on, check if the
headlamps illuminate normally.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
use Troubleshooting/inspection Service
Points
− How to Cope with Intermittent
).
NO :
Replace the ETACS-ECU.
AC313872 AH
Connector: B-134
Harness side
Junction block (Rear view)
System switch
Check condition
Passing lamp switch
When the passing switch
is turned from off to on
Main
Index
Group
TOC
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